单项选择题

关于发动机有效转矩的说法,正确的是()

A.是曲轴对外输出的扭矩
B.用Te表示,单位为N●mm
C.大小与发动机转速无关
D.当功率一定时,与转速成正比
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问答题

Introduce university of Oxford according to the text 5. 建校时间 The college was founded in _______________ by ______________.

答案: The college was founded in 1096 by King William II.请注意,实际上牛津...
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